What is the approximate winter temperature on the West Coast of the United States?

The coldest month on the West Coast of the United States is February.

The climate on the West Coast of the United States is roughly divided into oceanic climate and Mediterranean climate. Oceanic climate is the most basic climate type on the earth. The general characteristic is that it is less affected by the mainland and more affected by the ocean. Under oceanic climate conditions, the annual and daily changes in temperature are relatively gentle, and the annual and daily ranges are smaller than in continental climates. Spring temperatures are lower than autumn temperatures. The highest and lowest temperatures throughout the year occur later than in continental climates; the hottest month is August and the coldest month is February.

Climate formed by the action of huge water bodies in the ocean. The climate includes ocean surfaces or islands and the offshore portions of continents where prevailing air currents originate from the ocean. Marine climate has the following characteristics:

① The annual and daily changes in temperature are very small, and no daily changes are even observed on the ocean surface. The extreme value of the annual change is generally one month behind the mainland, for example, the coldest month is February and the warmest month is August. In high latitudes, the coldest month may be March, and the warmest month may be September (such as San Francisco). Autumn is warmer than spring.

②The seasonal distribution of precipitation is relatively even, with many precipitation days but low intensity. There are frequent clouds and fog and high humidity.

③ There are many storms in tropical oceans. For example, the southwestern part of the North Pacific and the South China Sea are areas where typhoons are generated and have strong impacts. Tropical storms (including typhoons) are a very important meteorological disaster.

④ Cloudy and foggy weather with high humidity. Most continental areas near the ocean have maritime climate characteristics, and the coastal areas of Western Europe are typical maritime climate areas on the continent. The Mediterranean climate is a maritime climate that occurs on the west coast of the continent between 30 and 40 degrees latitude. The Mediterranean coast is the most obvious, and other areas such as the California coast in North America, central Chile in South America, and the Cape of Good Hope region at the southern tip of Africa also have similar climates.

The characteristics of the Mediterranean climate are: controlled by the westerly wind belt in winter, frontal cyclones are frequently active, the climate is mild, the temperature in the coldest month is between 4 and 10°C, and the precipitation is abundant. In summer, under the control of subtropical high pressure, the airflow sinks, resulting in a hot, dry climate with little rain, few clouds and abundant sunshine. The annual precipitation is 300-1000 mm, with the winter half year accounting for about 60%-70%, and the summer half-year only 30%-40%. Winter precipitation is more than summer.

There is a big difference in summer temperatures between the coast and the inland. Affected by cold ocean currents, the temperature along the coast is lower. The hottest month is below 22 degrees Celsius. The air is relatively humid and foggy, which is called cool summer type. Inland, far away from the sea, the ocean regulation is small, the air is dry and warm, and the hottest monthly temperature is above 22°C, which is called the warm summer type. The characteristic of the Mediterranean climate is that there is less rain during high temperature periods and more rain during low temperature periods. This uncoordinated combination is very detrimental to plants.

During the growing season, plants must undergo hot and dry exercise. In order to reduce evaporation, natural vegetation is mostly evergreen hard-leaf forests such as short trees and shrubs